Here are all the options parts for the Xray NT1 2018 and olders
Reference 06335510
Brand: XRAY
2-SPEED SHAFT - 335510
Reference 06335521
Brand: XRAY
LIGHTWEIGHT CARRIER FOR 2-SPEED GEAR (2nd) - ALU + BALL-BEARING-3355
Reference 06335522
Brand: XRAY
ALU SMALL CARRIER FOR 2-SPEED GEAR (2nd) + BALL-BEARING - ALU 7075 T6
Reference 06335523
Brand: XRAY
ALU SMALL CARRIER FOR 2-SPEED GEAR (2nd) + BALL-BEARING - SOFT - 3355
Reference 06335530
Brand: XRAY
DRIVE FLANGE WITH ONE-WAY BEARING - ALU 7075 T6 - 335530
Reference 06335530-O
Brand: XRAY
DRIVE FLANGE WITH ONE-WAY BEARING - ALU 7075 T6 - ORANGE - 335530-O
Reference 06335541
Brand: XRAY
COMPOSITE SMALL 2-SPEED GEAR BOX SHOE - SET - 335541
Reference 06335571
Brand: XRAY
ADAPTER SMALL 2-SPEED - 335571
Reference 06335583
Brand: XRAY
SPRING FOR SMALL GEAR BOX - MEDIUM-HARD (2) - 335583
Reference 06335590
Brand: XRAY
HEX SCREW SFH M3x6 - GRINDED (3) - 335590
Reference 06335800-O
Brand: XRAY
COMPOSITE BELT PULLEY COVER SET - GRAPHITE - 335800-O
Reference 06335886-O
Brand: XRAY
LOW FRICTION COMPOSITE BELT PULLEY 26T - MID-SIDE - GRAPHITE - 335886